ASTM E1333 PDF

More D This method employs a single set of environmental conditions but different product loading ratios to assess formaldehyde concentrations in air and emission rates from certain wood products. The conditions controlled in the procedure are the conditioning of specimens prior to testing, exposed surface area of the specimens in the test chamber, test chamber temperature and relative humidity, number of air changes per hour, and air circulation within the chamber. At the end of a specified time period in the test chamber, the air is sampled, and the concentration of formaldehyde in the air and emission rate are determined. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

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A number in parentheses indicates the year of last reapproval. The concentration in air andemission rate is determined in a large chamber under specifictest conditions of temperature and relative humidity.

Thegeneral procedures are also intended for testing product com-binations at product-loading ratios and at air-exchange ratestypical of the indoor environment 1. The average concentration and emission ratereported, thus, will not provide information on higher or loweremitting panels in the test lot. When this test method is used for evaluating other thannewly manufactured panel products after original application,installation or use , the method of packaging and shipping theproduct for testing shall be described in the test report.

If another analytical proce-dure is used to determine the quantity of formaldehyde in theair sample, that procedure shall give results of equivalent orgreater accuracy and precision than the adapted chromotropicacid procedure. The test reportshall note the analytical procedure employed. NOTE 1—3The chromotropic acid analytical procedure described in thistest method is applicable for testing urea-formaldehyde bonded woodproducts.

A more sensitive analytical procedure is recommended for testing woodpanel products where formaldehyde concentrations in air are anticipated tobe at or below this level. DNPH is recognized as such a method. Measurement results are also usedfor comparing concentrations in air and emission rates fromdifferent wood products 2 and for determining compliancewith product standards.

NOTE 2—ASTM Committee D22 has developed Guide D whichdescribes small-scale environmental equipment and techniques suitablefor determining organic emissions and emission rates from materials andproducts used indoors. The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.

Current edition approved Oct. Published December Originallyapproved in Last previous edition approved in as E — United States1responsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specific hazardstatements, see Section 7. Referenced Documents2. Significance and Summary of Test Method4. This testmethod provides a standard means of testing typical productsizes, such as 1.

This test method employs a singleset of environmental conditions but different product loadingratios to assess formaldehyde concentrations in air and emis-sion rates from certain wood products. Conditions controlled inthe procedure are as follows NOTE 3—Care must be exercised in the extension of the results toformaldehyde concentrations in air and emission rates from productsunder different conditions of air change rate or loading ratio, or both.

Modification in the analytical procedure shall be madewhen relatively high phenol formaldehyde concentrations are anticipated 3, 4. Capitol St. Paul, MN The interior surfaces of the chamber shall beof materials found to minimize adsorption.

All joints except for doors used forloading and unloading specimens shall be sealed. Doors shallbe self-sealing. The test chamber shall be equipped with metalspecimen racks with dividers spaced a minimum of mm 6 in. This shall be accomplished by passing make-up airthrough a filter bed of activated carbon, activated aluminaimpregnated with potassium permanganate, or other materialscapable of absorbing, adsorbing, or oxidizing formaldehyde.

It is also acceptable tocalibrate the airflow rate measuring device, as installed, usinga tracer gas technique described in Test Method E The air-intakeport and exhaust port shall be on different walls of the chamberand at different elevations. The chamber test shall be operatedat a positive pressure of 1 Pa 0. Theair flow shall be directed horizontally in the direction of thechamber length above where the test samples are to be placedin the chamber.

The fan shall be sized and positioned to achievea uniform concentration in air of formaldehyde within0. These locations shall be at three elevations, 0. The sampling lines shall be of materials found tominimize adsorption such as stainless steel, PTFE andaluminum, securely fixed to supports during the test, and shallbe as short as possible.

The length of the sampling line outsidethe chamber shall not exceed 6 m 20 ft. The solution becomes extremely hot during addition of sulfuricacid. Add acid slowly to avoid loss of sample due to splatter-ing. Test Specimens8.

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ASTM E1333

A number in parentheses indicates the year of last reapproval. The concentration in air andemission rate is determined in a large chamber under specifictest conditions of temperature and relative humidity. Thegeneral procedures are also intended for testing product com-binations at product-loading ratios and at air-exchange ratestypical of the indoor environment 1. The average concentration and emission ratereported, thus, will not provide information on higher or loweremitting panels in the test lot. When this test method is used for evaluating other thannewly manufactured panel products after original application,installation or use , the method of packaging and shipping theproduct for testing shall be described in the test report. If another analytical proce-dure is used to determine the quantity of formaldehyde in theair sample, that procedure shall give results of equivalent orgreater accuracy and precision than the adapted chromotropicacid procedure.

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Large Chamber Formaldehyde Testing Demonstration – ASTM E1333

More D Scope 1. The concentration in air and emission rate is determined in a large chamber under specific test conditions of temperature and relative humidity. The general procedures are also intended for testing product combinations at product-loading ratios and at air-exchange rates typical of the indoor environment 1.

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